Okay , so I'm cheap...well not really. I want a pair of dark brown boots with a med heel. I wouldn't mind a good used pair, and would be willing to spend 6oo or so. I'm too old to tuck and don't wear skirts that often hence the cheap part. How can I tell authentic on ebay and can someone point me in the right direction? Would I do better in the authenticate this section?... Thanks alot